| Tomball to Portage (Indiana) | 922.87 mi (1,485.22 km) |
| Tomball to Portage (Michigan) | 1,004.63 mi (1,616.79 km) |
| Tomball to Portage (Wisconsin) | 989.17 mi (1,591.92 km) |
| Tomball to Portales (New Mexico) | 533.03 mi (857.83 km) |
| Tomball to Porterville (California) | 1,412.85 mi (2,273.76 km) |
| Tomball to Portland (Maine) | 1,675.24 mi (2,696.04 km) |
| Tomball to Portland (Oregon) | 1,806.27 mi (2,906.91 km) |
| Tomball to Portland (Tennessee) | 690.12 mi (1,110.65 km) |
| Tomball to Portland (Texas) | 183.80 mi (295.79 km) |
| Tomball to Portsmouth (New Hampshire) | 1,633.74 mi (2,629.25 km) |
| Tomball to Portsmouth (Ohio) | 936.31 mi (1,506.84 km) |
| Tomball to Portsmouth (Virginia) | 1,201.53 mi (1,933.67 km) |
| Tomball to Post Falls (Idaho) | 1,661.37 mi (2,673.72 km) |
| Tomball to Potomac (Maryland) | 1,212.68 mi (1,951.61 km) |
| Tomball to Potomac Park (California) | 1,401.19 mi (2,255.00 km) |
